I'll second that, I have similar pedals to the Campus, and love them. They work just as well as any other platform for normal shoes or boots, and let you clip in when you want.

For shoes, I use the Diadora patrol shoes. They're not as painfully narrow as most cycling shoes, look good enough for semi-formal business, and are very comfortable. I wore them walking around, standing, and snapping photos for three hours tonight and was very comfortable. The only time I was aware of them was going up stairs (the stiff sole is very evident there) and when something crunched under the cleats.